Grinding-machine.



W. n. GHERKY. GRINDING MACHINE.

APPLICATION FILED JUNE 5, 1912.

1,095,963. Patented May 5, 1914.

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w. '1); GHERKYATQ GRINDING MACHINE. APPLICATION FILED-11111 2 .'1"91: 2 1,095 963 r I f 3 Patented May 5, 1914.

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lm Mums riage.

WILLIAM D. GHERKY, OFIHILADELPHIA, PENNSYLVANIA.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented May 5, 1914:.

Application filed June 5, 1912. Serial No. 701,929.

' T 0 all whom z'tmay concern:

Be it known that I, \YILLIAM D. GHERKY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia. and State of Pennsylvania, have invented a grinding element of the general type shown in the Nichols patent, which may be treated as a unit without theme of an in-. side frame or intermediate carriage.

I attain my object by providing a longitudinally reciprocating frame or carriage sliding in a fixed plane horizontally, and I suspend the bricks therein by means to be described so that they may be raised and lowered without raising or lowering the car- While grinding, the bricks are slightly clamped to prevent knocking through lost motion endwise, the clamping mechanism being released in raising or lowering the bricks. if desired, or so lightly set as to permit vertical travel of the bricks.

Briefly stated, the means by which I attain my object, which will be specifically described and claimed herein, include a bar extending lengthwise over and along the tops of the bricks, with means to suspend the bricks therefrom, and a feed screw carried by the reciprocating carriage, for raising and lowering the bricks through the agency of the common bar.

My invention is illustrated in the accompanying drawings in which;

Figure 1 is a side view of a portion of a grinding machine of the Nichols type, with my improvements applied thereto. Fig. 2

is atransverse sectional view taken on the line 22 of Fig. 1, and Figs. 2 and 2 are.

Fig. 6 being the same as that shown in Figs. 1 and 2.

In the drawings I have illustrated only one end of the machine, comprising a portion of the frame 1,-one of the tandem track 0 wheels 2, the handle 12, and a portion of the reciprocating connecting rod 15, which is supposed to be driven back and forth horizontally by any suitable motor device, as for example that described in the Nichols 5 patent aforesaid, or in my own prior applications.

Referring particularly to Figs. 1 and 2, the main frame is composed of side channels 1 and 1", between which the carriage 7g 3; connected by the knuckle joint 15 with the connecting rod 15, slides back and forth in horizontal fixed guides 11 -1 bolted on the opposite sides of the frame 1, as best shown in Fig. 2. The carriage 3 is substantially a rectangular box open above and below with one end 3* vertical and the other end 3 obliquely inc-lined for a purpose to beexplained. Projecting horizontally from opposite sides of the carriage are the integral flanges 3 and 3 which travel between the guides 11 11. Above the carriage, and spanning its opening, is the bridge 7, having sides 7 and a crown 7* with an upwardly projecting 001-. la-r 7 slotted to receive one or more lateral projections 9 on anut 9 internally threaded to receive the vertical feed screw 8, by means of which the grinding elements or units are raised and lowered. This screw carries at its upper end a hand-wheel 8, and at its lower end has a reduced neck 8 and a head 8?, to engage the clamping bar 6.

Arranged vertically in the carriage 3 is a tandem grinding element 4 composed of a plurality of units as t, 4:", 4 and 4:. These are held against lateral ,motion by direct engagement with the sides of the carriage 3, by which they are reciprocated back and forth along the top of the rail to be ground. In such grinding, it is necessary to provide some means for preventing motion of the bricks lengthwise, that is to say in the direction of travel of the carriage. For this purpose I provide an end wedge 5, one side of which is vertical and engages the end brick 4 through a distance piece or separator 5 while theother side of the wed e is inclined to engage the inclined end a of the carriage. The wedge is var; 119

tically movable by means of a screw 11 working in a bridge or projection on the carriage, and controlled by means of a handwheel 11 This wedge may be forced down firmly so as to force together the bricks and the interposed separators of Figs. 2 and 2 against any motion, but preferably it is adjusted so that the engagement of the bricks and separators is sutlicient to prevent knocking during grinding, but is insufiicient to prevent raising and lowering of the .bricks' in the carriage. The construction and arrangement of these bricks is the characteristic and most essential feature of my invention. In all the machines heretofore used and within my knowledge, in which similar bricks are employed, they have been clamped in an inner frame or holder, which was adapted to travel vertically in slides in the carriage, but to reciprocate therewith. Such an arrangement has serious drawbacks. Not only must the excessive weight of the brick-holder be reciprocated. but it is impossible to keep out endwise play and consequent knocking between the inner holder and the carriage or outer frame. Such knocking results in rapid deterioration and serious annoyance, especially when the machine is being used at night, which the exigencies of railway traffic generally require. Moreover, such a constructlon causes a complication of parts and resultant increase in first cost as well as cost of maintenance.

According to my present invention, the brick-holder or inner frame is dispensed with, the bricks being merely dropped loosely into the single frame or carriage 3, slightly wedged lengthwise of the carriage to take out the knock, and held to a straight surface for the rail and for vertical adjustment by means of a common bar 6 extending above and along their upper ends. Each brick or unit is individually secured to this bar, by means which I will now describe, as such means form a part of my invention.

In Figs. 1 and 6 I have shown, and shall specifically claim herein, the preferred form of attachment or suspension device, but I also illustrate in Figs, 8457 and 8 several modifications out of many which may be resorted to if desired, all of which are intended to be included within the scope of the generic claims appended hereto.

Referring to Figs. 1 and 6, the body of the brick 4 is provided with a stud hole 4: made while the brick is soft, during the process of manufacture, and slightly undercut, as shown. A headed stud 4, preferably of metal, is inserted in the hole, with its eX panded lower end 4P at thebottom thereof. The brick and the stud or rivet are held in a jig, and Babbitt metal, lead, or other molten material poured into fill the hole. When this material hardens the rivet or oeaeee stud is integrally attached to the brick. The preferable material I employ for the filling is sulfur, as it appears to give the best results in practice.

Referring to Fig. 3, a stud 4* of metal is shown secured'to one side of a double clamp P-4 which engages a dove-tail projection provided with a transverse dove-tail channel fitting over a complementary dove-tail 4" on the upper end of the brick t.

In Fig. 5 the stud 4: is again employed, but is connected to a separator block 48 lying between the bricks, and having opposite flanges engaging corresponding depressions 4 in the bricks. In this case one stud is common to two bricks.

Figs. 7 and 8 show simple forms of brick, each with a transverse opening l through it to receive a transverse pin passing through the opposite sides or ears on the common bar 6. The form in Fig. 8 in addition is shouldered at 4".

Returning now to Fig. 1, but referring also for modifications to Figs. 345-7 and 8, the bricks are-all held in line, and are raised and lowered by means of the common bar 6. This bar is composed of two halves (in the form shown in Fig. 1) as best indicated at 6 and 6 in Fig. 2, the two halves having complementary semi cylindrical channles 6 and 6", the former (6 extending all the way through the bar from top to bottom, the receive the studs 4*, and

the latter (6) coming down half way from the top and of a diameter to receive the neck 8 of the screw 8, and hold the head 8 in the channel. The wo halves of the bar may have dowels to aline them, and are bolted together as indicated in Fig. 1. By removing the bolts, not only is 'thebar detached from the screw 8, but .it is also simultaneously detached from all the grinding units.

Attached to the screw beneath the bridge 7 is a collar 8, and depending from the underside of the bridge crown is a flanged collar 7 Around this collar, and bearing against the bridge crown at its upper end and the collar 8 at its lower end is a pressure spring 10, which tends constantly to force down the screw, the bar, and the bricks.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a grinding machine, a frame, a reciprocating carriage sliding in said frame and having a vertically disposed socket, and an abrasiveelement having its body seated in said socket against motion in the direction of travel of the carriage, with means mounted on the carriage and connected to said abrasive element independently of the carriage itself for raising and lowering the element therein. I

2. In a grinding machine, a frame, a reciprocating carriage sliding in said frame, and a grinding element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage, with means mounted on the carriage and connected independently of the carriage to each unit for raising and lowering the same.

3. In a grinding machine, aframe, a reciprocating carriage sliding in said frame, a grinding element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage, a bridge on said carriage above the grinding element, and suspension means carried on said bridge and connected in common to all the units independently of the carriage for raising and lowering the same.

4. In a grinding machine, a frame, a recipro'cating carriage sliding in said frame, a grinding elementcomposed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage, a bridge on said carriage above the grinding element, and vertically movable suspension means secured in said bridge and directly connected independently of the carriage to each of said tandem units, whereby said units may be raised and lowered in the carriage Without an intermediate frame or holder.

5. In a grinding machine, a frame, a reciprocating carriage sliding in said frame, a grinding element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage, a bridge on said carriage above the grinding element, a bar extendmg over all of said tandem units, means connecting each unit to said bar, and vertically movable adjusting means carried on saidbridge and connected to said bar.

6. In a grinding machine, a frame, a reciprocating carriage sliding in said frame, a grinding element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of thecarriage, a bridge on said carriage above the grinding elements, a bar extending over all of said tandem units, suspension means secured to and carried by each unit adapted to engage said bar, and vertically movable adjusting means for the bar carried on said bridge.

7. In a grinding machine, a frame, a reciprocating carriage sliding in said frame, a grinding element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage, a bridge on said carriage above the grinding elements, a vertically movable element carried on said bridge, and means for detachably connecting thesame to all of the units. j

8. A grinding machine comprising a main frame, a single carriage therein, and a grinding element in said carriage with suspension means directly connected to. said grinding element independently of the carriage and adapted to raise. and lower the same in the carriage.

9. In a grinding machine,-a frame, a, re-

ciprocating carriage sliding in said frame, agrinding'element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage a bridge on said carriage above the grinding elements, a bar extending over all of said tandem units, a vertical feed screw in the bridge, and a suspension device on the upper end of each unit, said bar being connected to said feed screw and having means to clamp the suspension devices on all the units. 10. In a grinding machine, a frame, a reciprocating carriage sliding in said frame, a grinding element composed of a plurality of tandem units secured in said carriage against motion in the direction of travel of the carriage, a bridge on said carriage above the grinding elements, a bar extending over all of said tandem units, a vertical feed screwin the bridge, and a suspension device on the upper end of each unit, said bar being divided longitudinally into two halves with means to secure them together so as to clamp the lower end of the feed'screw and the. suspension devices on all the units.

11. In a grinding machine, a frame, a reciprocating carriage sliding in said frame,

a grinding element composed of a plurality of tandem units secured in said carriage against motion m the direction of travel of the carriage, a bridge on said carriage above I the grindingelements, a bar extending over all of said tandem units, a vertical feed screw in the bridge, a resilient pressure device between the bridge and the bar, and a suspension device on the upper end of each unit, said bar-being connected to said feed screw and having means to clamp the suspension devices on all the units.

12. In a machine of the class described, a main frame, a single carriage traveling therein for grinding purposes, means for driving said frame, a suspension device having a clamp, and a grinding element in the carriage having its upper end provided with an inset headed stud for engaging said clamp.

13. In a machine of the class described, a frame, a, carriage, longitudinal guides on the inside of said frame, a plurality of freely suspended tandem grinding elements in sald carriage, a common suspension device for said griding elements, and separators in the carriage between the grinding elements, having lateral projections engaging the guideways on the frame.

14; In a machine of the class described, a frame, a carriage, longitudinal guides on the inside of, said frame, a plurallty of freely suspended tandem grinding elements in said carriage, a common suspension device for said grinding elements, and separators in the carriage between the grinding elements, having lateral projections engaging the guideways on the frame, and their middle portions shaped to permit the rise and fall of the grinding elements.

In testimony whereof I affix my'signature in presence of two witnesses.

WILLIAM D. GHERKY. Witnesses:

JOHN P. TARBox, JAMES H. MARE. 

